commit 61cff3dd8633be10ecea0894e802302cb65ff384
Author: Gary van der Merwe <garyvdm@gmail.com>
Date:   Fri Jun 1 12:01:00 2012 +0200

    dmx: Fix seg fault when using glxproxy.

diff --git a/hw/dmx/glxProxy/glxscreens.c b/hw/dmx/glxProxy/glxscreens.c
index f725bd1..80fc082 100644
--- a/hw/dmx/glxProxy/glxscreens.c
+++ b/hw/dmx/glxProxy/glxscreens.c
@@ -225,6 +225,10 @@ __glXScreenInit(GLint numscreens)
     DMXScreenInfo *dmxScreen0 = &dmxScreens[0];
 
     __glXNumActiveScreens = numscreens;
+    MAXSCREENSALLOC(__glXActiveScreens);
+    if (!__glXActiveScreens)
+        return False;
+    
 
     CalcServerVersionAndExtensions();